WO2015196427A1 - 一种电解液溶质、电解液及高电压超级电容器 - Google Patents
一种电解液溶质、电解液及高电压超级电容器 Download PDFInfo
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- WO2015196427A1 WO2015196427A1 PCT/CN2014/080867 CN2014080867W WO2015196427A1 WO 2015196427 A1 WO2015196427 A1 WO 2015196427A1 CN 2014080867 W CN2014080867 W CN 2014080867W WO 2015196427 A1 WO2015196427 A1 WO 2015196427A1
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- electrolyte
- methyl
- high voltage
- solvent
- supercapacitor
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/60—Liquid electrolytes characterised by the solvent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to the field of electrochemistry, and in particular to an electrolyte solution and an electrolyte for a high voltage supercapacitor and a high voltage supercapacitor using the same. Background technique
- Supercapacitors also known as gold capacitors, electrochemical capacitors, use ion adsorption (electric double layer capacitors) or surface rapid redox reactions (tantalum capacitors) to store energy.
- a supercapacitor is a new type of energy storage device between a battery and a conventional electrostatic capacitor. Supercapacitors store hundreds or thousands of times the charge of conventional electrolytic capacitors, can be fully charged and discharged in seconds, have a higher power input or output than the battery, and can be reached in less time. At the same time, supercapacitors have the advantages of short charge and discharge time, long storage life, high stability, wide operating temperature range (-40 ° C ⁇ 70 ° C), etc., so they are widely used in the field of consumer electronics, new energy power generation systems.
- distributed energy storage systems intelligent distributed power grid systems, new energy vehicles and other transportation fields, energy-saving elevator cranes and other load fields, electromagnetic bombs and other military equipment fields and motion control areas, involving new energy generation, smart grid, new Energy vehicles, energy-efficient buildings, industrial energy conservation and emission reduction, etc., belong to the standard full range of low-carbon economic core products o
- supercapacitors Compared with electrochemical cells, supercapacitors have low energy density and low operating voltage. These shortcomings greatly limit the application of supercapacitors in hybrid and electric vehicles.
- the current commercial supercapacitor electrolyte works at a voltage exceeding 2. 7V, which causes electrolysis of the electrolyte. Decomposition causes a significant increase in the pressure inside the capacitor, and the electrochemical performance is significantly reduced, eventually leading to capacitor failure.
- the supercapacitor electrolyte mixed with the conventional tetraethylammonium tetrafluoroborate (Et 4 NBF 4 ) has a certain high withstand voltage, but does not describe the life characteristics of the supercapacitor.
- the Chinese invention patent publication No. GN1 01 809693A mentions that various acid scavengers are added to the conventional Et 4 NBF 4 acetonitrile (AN) solution to reduce the rate of pressure rise in the capacitor to increase the working voltage of the supercapacitor.
- AN acetonitrile
- the technical scheme adopted by the present invention is to provide an electrolyte solution, and the chemical structural formula thereof is one or more of the following structural formula 1, structural formula 2 and structural formula 3;
- — A is an anion
- n and m are the number of substituents on the ring
- n is an integer from 0 to 6
- m is an integer from 0 to 7.
- the cation of the above electrolyte solution is: N-methyl-1,4-diazabicyclo[2. 2. 2]octane ammonium, N-ethyl-1,4-diaza Cyclo [2. 2. 2] octane ammonium, N, N-dimethyl-1, 4-diazabicyclo[2. 2. 2] octane ammonium, N-methyl-N-ethyl- 1, 4-diazabicyclo[2. 2. 2]octane ammonium, N,N-diethyl-1,4-diazabicyclo[2. 2. 2]octane ammonium,
- N-methyl-1-azabicyclo[2.2.2]octane ammonium and N-ethyl-1-azabicyclo[2.2.2]octane ammonium are N-methyl-1-azabicyclo[2.2.2]octane ammonium and N-ethyl-1-azabicyclo[2.2.2]octane ammonium .
- the cation of the above electrolyte solution is: N-methyl-1,4-diazabicyclo[2. 2. 2] octane ammonium, ⁇ dimethyl-1,4-diaza One or more of cyclo[2.2.2]octane ammonium and N-methyl-1-azabicyclo[2.2.2]octane ammonium.
- the anion of the above electrolyte solution is: tetrafluoroborate, hexafluorophosphate, bis(fluorosulfonyl)imide, bis(trifluoromethylsulfonyl)imide, bis(trifluoromethylsulfonate) One or more of an acyl)methyl group and a perfluoroalkyl sulfonate group.
- the anion dissolved in the above electrolyte solution is tetrafluoroborate.
- the above high voltage supercapacitor means that the super capacitor charging cutoff voltage is
- Another aspect of the present invention provides an electrolyte for use in a high voltage supercapacitor comprising a solvent and a solution containing the electrolyte solution of any of the above.
- the solvent is one or a mixture of two or more of a solvent of a nitrile, an ether, an amide, an ester, and a sulfone.
- the solvent in the above electrolyte is acetonitrile, propionitrile, butyronitrile, methoxypropionitrile, ethylene carbonate, dimethyl carbonate, propylene carbonate, Y-butyrolactone, Y-valerolactone, 1,3-propane sultone, 1, 4-butane sultone, sulfolane, methyl ethyl sulfone, dimethyl sulfone, diethyl sulfone, dimethyl sulfoxide, diethyl sulfoxide and four One or a mixture of two or more kinds of methylene sulfoxide.
- a high voltage supercapacitor comprising an electrolyte and a battery immersed in the electrolyte.
- the battery cell is composed of two collector electrodes and a diaphragm disposed between the two collector electrodes, and the two collector electrodes are attached thereto.
- the activated carbon, the electrolyte solution contains A, and the A is one or more of the chemical structural formula of the structural formula 1, the structural formula 2 and the structural formula 3; wherein R, R, R 2 , R 3 , R 4 corresponds to a hydrocarbon group having 1 to 5 carbon atoms, A is an anion, n and m are the number of substituents on the ring, and n is 0-6. The number m is an integer from 0-7.
- the concentration of A in the electrolyte is 0, 05-2. Omo I / L, preferably 0. 5-1. 5mo I / L.
- the cation of A in the above high voltage supercapacitor is: N-methyl-1,4-diazabicyclo[2. 2. 2]octane ammonium, N, N-dimethyl-1, One or more of 4-diazabicyclo[2.2.2]octane ammonium and N-methyl-1 -azabicyclo[2.2.2]octane ammonium.
- the anion is: tetrafluoroborate, hexafluorophosphate, bis(fluorosulfonyl)imide, bis(trifluoromethylsulfonyl)imide, double (three One or more of fluoromethylsulfonyl)methyl and perfluoroalkylsulfonate.
- the solvent is acetonitrile, propionitrile, butyronitrile, methoxypropionitrile, ethylene carbonate, dimethyl carbonate, propylene carbonate, Y-butyrolactone, Y- Valerolactone, 1, 3-propane sultone, 1, 4-butane sultone, sulfolane, methyl ethyl sulfone, dimethyl sulfone, diethyl sulfone, dimethyl sulfoxide, diethyl One or a mixture of two or more of sulfoxide and tetramethylene sulfoxide.
- the charging cut-off voltage of the above-mentioned high voltage supercapacitor is 2. 7V - 3. 2V.
- the high voltage supercapacitor has a charge cutoff voltage of 2. 7-3. 0V
- the electrolyte solution is trimethyl propyl tetrafluoroborate
- the solvent is propylene carbonate.
- the high voltage supercapacitor has a charge cutoff voltage of 2. 8-3. 2V
- the electrolytic solution is trimethyl propyl tetrafluoroborate
- the solvent is acetonitrile.
- the utility model has the beneficial effects that: the high voltage supercapacitor prepared by using the electrolyte prepared by the electrolyte solution of the invention can work stably for a long time under the voltage of 2. 7V-3. 2V, greatly improving the energy density and maintaining Its high power density characteristics greatly extend the working life of high voltage supercapacitors.
- a corresponding molar ratio of the corresponding organic amine such as 1,4-diazabicyclo[2.2.2]octane
- DMG dimethyl carbonate
- the supercapacitor model is assembled in a glove box:
- the battery core includes two collector electrodes made of aluminum foil, two working electrodes made of activated carbon, and a fiber cloth separator interposed therebetween, but is not limited to this structure.
- the cells were immersed in the following comparative examples and the electrolytes in the examples, and sealed with aluminum shells and colloidal particles.
- the supercapacitor testing process is:
- O-methyl-1,4-diazabicyclo[2. 2. 2]octane tetrafluoroborate (MDAG0BF 4 ) was used as a solvent, and AN was used as a solvent to prepare an O.Omol/L electrolyte.
- the conductivity at 25 ° C was measured, and the dissolution, solvent and concentration of the electrolyte were adjusted, as shown in the following examples and comparative examples.
- the conductivity results are shown in Table 1.
- the supercapacitor was fabricated using the electrolyte of this example and subjected to electrochemical performance tests. The results of the life test are shown in Table 2.
- Example 2 In accordance with the conditions of Example 1, the dissolution, solvent and concentration of the electrolyte were adjusted. The detailed data are shown in Table 2-6. The chemical structure of each solution is as follows:
- MABCOBF a supercapacitor was fabricated using the electrolyte of the above example and subjected to electrochemical performance test.
- the life test results are shown in Table 2 - Table 5, respectively.
- the conductivity of the Omol/L electrolyte was measured by using tetraethylammonium tetrafluoroborate as the solvent and AN as the solvent. The results are shown in Table 1.
- the supercapacitor was fabricated using this electrolyte and subjected to electrochemical performance tests. The life test results are shown in Table 2.
- Example 1 Example 2
- Example 3 Example 4
- Example 5 Example 6 Conductivity 43.4 45.2 44.6 46.3 11.9 11.8 / mS/ cm
- Ammonium tetraethylammonium tetrafluoroborate 0.1 mol/L Comparative example 1 Ammonium tetraethyltetrafluoroborate: 1 mol/L Acetonitrile 1500 820 240
Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2014/080867 WO2015196427A1 (zh) | 2014-06-26 | 2014-06-26 | 一种电解液溶质、电解液及高电压超级电容器 |
KR1020157017682A KR101785576B1 (ko) | 2014-06-26 | 2014-06-26 | 전해액 용질, 전해액 및 고전압 슈퍼 커패시터 |
JP2016528318A JP6229211B2 (ja) | 2014-06-26 | 2014-06-26 | 高電圧ウルトラキャパシタ |
US14/655,289 US9870874B2 (en) | 2014-06-26 | 2014-06-26 | Electrolyte solute, electrolyte, and high-voltage supercapacitor |
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PCT/CN2014/080867 WO2015196427A1 (zh) | 2014-06-26 | 2014-06-26 | 一种电解液溶质、电解液及高电压超级电容器 |
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JP (1) | JP6229211B2 (zh) |
KR (1) | KR101785576B1 (zh) |
WO (1) | WO2015196427A1 (zh) |
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KR101896835B1 (ko) | 2017-04-10 | 2018-09-10 | 군산대학교산학협력단 | 비스(옥살레이트)보레이트를 음이온으로 갖는 전해질 염을 함유하는 전해액 조성물 또는 이를 포함하는 전기이중층 커패시터 |
US20200299302A1 (en) * | 2017-11-21 | 2020-09-24 | Nitto Denko Corporation | Basic cyclic amino-ammonium ionic liquids compositions and elements including the same |
KR102172605B1 (ko) | 2018-10-25 | 2020-11-02 | 한국세라믹기술원 | 슈퍼커패시터의 전해액, 이를 이용한 고전압 슈퍼커패시터 및 그 제조방법 |
KR102343771B1 (ko) | 2019-11-27 | 2021-12-28 | 한국세라믹기술원 | 슈퍼커패시터의 전해액, 이를 이용한 고전압 슈퍼커패시터 및 그 제조 방법 |
KR102354600B1 (ko) | 2020-03-04 | 2022-01-24 | 심향택 | 겨드랑이 부위 땀 흡수 및 냄새 방지용 기능성 발열 속옷 |
KR102347581B1 (ko) | 2020-03-06 | 2022-01-05 | 한국세라믹기술원 | 이온성 액체를 포함하는 슈퍼커패시터의 전해액, 이를 이용한 고전압 슈퍼커패시터 및 그 제조방법 |
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US20170110260A1 (en) | 2017-04-20 |
KR101785576B1 (ko) | 2017-11-06 |
JP2016526305A (ja) | 2016-09-01 |
KR20160016741A (ko) | 2016-02-15 |
US9870874B2 (en) | 2018-01-16 |
JP6229211B2 (ja) | 2017-11-15 |
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